1. The U.S. dollar is the world's most important trading and reserve currency. Gold, oil, ore raw materials, etc. are priced and settled in U.S. dollars, as well as trade between various countries. The United States must provide the world with U.S. dollars, so the United States will always use U.S. dollars.

It is borrowing money, but the United States cannot print unlimited U.S. dollars, which will depreciate, so it flows back through the issuance of Treasury bonds. At the same time, the United States is also a major investment destination. In addition to buying Treasury bonds from the United States, it also flows back U.S. dollars through investment and imports into the United States.

If the United States pays off its money, it means that the United States is no longer the world's number one power, a new currency will be born, and the dollar will decline along with the pound. But can you see it now?

2. It can stabilize the exchange rate. If there are too many U.S. dollars, it will force the opponent's currency to appreciate, while the U.S. dollar will depreciate; returning U.S. dollars by purchasing U.S. Treasury bonds can reduce appreciation pressure.

3. In addition to sovereign countries, any company or individual will hold U.S. Treasury bonds; more than half of the United States is mainly held by the United States, such as the Federal Reserve, investment banks, labor unions, police and education retirement funds.

4. Devaluation will cause inflation in the United States.

5. Any group or individual can buy U.S. bonds, trade and earn the price difference as well as collect interest.

Reference: The work of the old man in the cornfield, please indicate the source when copying and pasting.